• 자원환경지질
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• 제33권4호
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• pp.283-293
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• 2000

A set of geophysical survey results over an area in Bookil-myun, Chungwon-Gun, Chungcheongbuk-Do is presented; resistivity logging, d.c. sounding, dipole-dipole resistivity, and controlled-source magnetotelluric (CSMT) surveys. These surveys were chosen in this research for the estimation of the basement depth and the delineation of the hydrogeologic structure over the survey area. The results provide an optimal input to a hydrogeologic modeling analysis using the strategies built in GIS software. A total of 14 lines of dipole-dipole resistivity surveys, 25 stations of d.c. sounding and 6 stations of CSMT sounding were performed. In addition 10 boreholes were chosen for resistivity logging to correlate the logs to the surface data. A quantitative information on the hydrogeologic structure over the area is provided by synthesizing the results from various geophysical data and attribute layers are constructed by utilizing a GIS software Arc/ Info. The constructed layers match well to the hydrogeologic structures, which were outlined from the drilling data. The methodology tested and adopted in this study would be useful for providing a more reliable input to the hydrogeologic model setup.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.31-35
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• 2000

We investigate the groundwater distribution and chemical characteristics for 3 or 5 districts every year and make the hydrogeologic map on a scale of 1:50,000. We draw the hydrogeologic digital map based on "The Handbook for the Drawing and Management of Hydrogeologic Map" which was published by MOCT and KOWACO in 1998. But, the Stiff diagram and well's notation are difficult to be presented in the digital map using the commercial Arcview GIS tools. So we develop the script file with Avenue language to represent them in Arcview GIS tool. At first, we design the database for the chemical analysis result of groundwater and well identification, and make the program code with Avenue language to display them on the digital map. And next we test the usefulness of the program code. As a result, we find that the script file is very useful for drawing the symbols and diagrams in hydrogeologic digital map using ArcView GIS.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.426-430
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• 2004

In aquifers connected hydraulically, the levels of groundwater respond to stream stages. Analytical solutions by Laplace transform and convolution integral are used to get some response patterns about hydrogeoiogic parameter such as hydraulic conductivity, specific storage in confined aquifer. This method has the advantage to do hydrogeologic parameter estimations only with stream stage changes.

• 대한토목학회논문집
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• 제34권5호
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• pp.1409-1420
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• 2014

지하수위 변동 해석모델을 이용하여 제주지역의 대수층 수리지질 매개변수인 반응계수와 배수가능공극을 추정하고 고도에 따른 분포특성 및 민감도분석을 실시하였다. 대수층 매질의 특성치인 배수가능공극은 고도에 대해 일정한 경향성을 보이지 않으며 지하수의 흐름 특성치인 반응계수는 고도가 높아질수록 낮아지는 뚜렷한 경향성을 보였다. 매개변수들에 대한 민감도를 알아보기 위해 매개변수의 평균 및 관계식을 이용하여 추정함양량을 비교한 결과, 전 유역(강정천, 외도천, 천미천, 한천)에 대한 매개변수 관계식을 적용하여도 미계측 유역내 매개변수의 추정이 가능할 것으로 판단된다. 따라서 본 연구의 결과를 통해 대표적인 수리지질 매개변수의 분포특성을 파악하여 미계측지역에서 매개변수를 추정함으로써 지하수모델링의 기초자료로도 활용 가능할 것으로 기대한다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 추계학술발표회
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• pp.426-430
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• 2003

Subsurface biobarrier technology has potential applications to contain contaminated groundwater and/or to degrade toxic pollutants in groundwater. Effective biobarrier formation is need to assess of hydrogeologic characteristics and to conduct practical operation strategies and design based on this prior to design biobarrier. Thus, in this study, we examined hydrogeologic characteristics in biobarrier construction site. Hydraulic conductivities which calculated from slug test data have shown difference with each well as 1.20$\times$10$^{-3}$ -6.00$\times$10$^{-5}$ cm/sec. Tracer test is a method in which concentration of tracer solution during withdrawal in each well by vacuum extraction system is measured with time. Tracer solution was continuously injected by constant head tank. Measured tracer concentration versus time data were fitted to analytical solution of convection dispersion equation (CDE). The fitting data of CDE to the measured data at each extraction well yielded were 0.61cm/min(pore velocity), 5.38$\textrm{cm}^2$/min(dispersion coefficient) for discharge rate of 0.47 1/min and 1.75cm/min(pore velocity), 36.34$\textrm{cm}^2$/min(dispersion coefficient) for discharge rate of 0.93 1/min. As a result, we acquired fundamental parameters which need to design biobarrier and operation strategies.

• 대한지질공학회:학술대회논문집
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• 대한지질공학회 2003년도 정기총회 및 학술발표회
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• pp.67-73
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• 2003

• 물과 미래
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• 제32권6호
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• pp.82-95
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• 1999

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.430-433
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• 2005

In this study, weight of evidence(WOE) technique based on the bayesian method was applied to estimate the groundwater yield characteristics in the Pocheon area in Kyungki-do. The ground water preservation depends on many hydrogeologic factors that include hydrologic data, landuse data, topographic data, geological map and other natural materials, even with man-made things. All these data can be digitally collected and managed by GIS database. In the applied technique of WOE, The prior probabilities were estimated as the factors that affect the yield on lineament, geology, drainage pattern or river system density, landuse and soil. We calculated the value of the Weight W+, W- of each factor and estimated the contrast value of it. Results by the ground water yield characteristic calculations were presented in the form of posterior probability map to the consideration of in-situ samples. It is concluded that this technique is regarded as one of the effective technique for the feasibility mapping related to detection of groundwater bearing zones and its spatial pattern.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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• pp.123-126
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• 1998

We have conducted surface electrical resistivity surveys along with the electrical logging at Bookil-Myun, Chungwon-Goon, Choongchungbuk-Do to determine the depths of basement and water table, and for the purpose of preparing the basic input data for hydrogeologic model combined with GIS. A twenty lines of dipole-dipole array survey and a twenty-five stations of resistivity sounding were performed and ten holes were employed for electrical logging to cross check the surface data. A combined interpretation gave the quantitative information of the shallow geologic structure over the area and we constructed layers using the grid analysis of Arc/info. The constructed layers were turned out to be similar to the geologic structure confirmed from the drilling data and we concluded that the methodology adopted in this study would be applicable to hydrogeologic model setup as a tool of providing the basic input data.

• 한국지하수토양환경학회지:지하수토양환경
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• 제9권3호
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• pp.27-32
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• 2004

해안가에 발달된 단열암반 대수층에서 수리지질 인자를 추정하기 위하여 조석에 의한 지하수위 변동 현상을 이용하는 조석분석법을 적용하였다. 두 관측정의 지하수위 시계열 자료는 조석에 의한 대수층내 유효응력 전달에 의해 조수위 변동과 비슷한 사인곡선 형태로 나타났다. 교차상관함수를 이용하여 조석과 두 관측정의 지하수위 변동 사이의 개략적인 시간지연을 계산하였으며, 그 결과 심도가 깊은 공의 시간지연이 크게 나타났다. 그리고 조석효율과 시간지연을 계산하여 이들로부터 각각의 저류계수를 추정한 결과 큰 차이를 나타내었다. 본 연구지역에서 실시된 순간충격 시험에 의하여 측정된 저류계수는 조석분석법에서 시간지연을 이용하여 계산한 값과 유사하게 나타나며, 심도가 깊은 공에서 보다 비슷한 값을 나타내고 있다. 조석효율은 피압층에 발달된 균열로 인한 자유면대수층의 영향과 수직적인 지하수 유동에 의해 대수층의 수리상수를 추정하는데 한계가 있는 것으로 사료된다. 따라서 조석분석법은 해안대수층의 수리지질인자를 추정하는데 지하수공의 위치나 대수층의 수리지질적 특성을 고려하여 해석한다면 경제적이고 유용한 방법으로 판단된다.